Drafting implement



April 23, 1929. I H. FALLETTA DRAFTING IMPLEMENT Filed May 1927 INVEN R being provided for varying the spacing of Patented Apr. 23, 1929.

rArsnr orrics.

HECTOR FALLETTA, OE LOS ANGELES, CALIIiORNIA.

DRAFTING IMPLEMENT.

Application filed May 7, 1927. Serial No. 189,715.

This invention relates to improvements in drafting implements and appliances and more particularly to compasses and has for its object to provide a simple, GillClQIlt and inexpensive device of this character.

- One of the objects of my invention is to provide a drafting appliance designed to effect the ruling of parallel. lines for musical notatiomlettering in connection with drawings or for any other purpose.

Another object of my invention is to provide improved means for ruling parallel lines by means of a compass or dividers means the parallel lines drawn.

A still further ob ect oi my 1nvent1on is to provide, in a compass having means for ruling parallel lines, means forgaugingthe spaces between the ruled parallel lines for the purpose 01 providing uniform margins or spaces between the several sets of parallel lines.

Another object of my invention is to provide an attachment to compasses to be associatedwith the pencil pointthereofdesigned to line'the pencil point against the edge of a ruler againstwhich the pencil point is drawn to mark out a rectilinearoutline on paper.

And a still further object of my invention is to provide an attachment for compasses provided with pencil points for ruling or tracing parallel lines characterized by the feature that an extended bearing surface is presented against the edge of the ruling and the pencil point itself made to follow its rectilinear course without directly contacting the ruler edge.

In carrying out the purposes or" my inventionI provide a drafting implement with .a bifurcated leg, so that this leg has two laterally adjustable branches and, a pencil point designed to be mounted 1n each separate,

branch; means are also provided for separating the branches diiierent distances. to determine how far apart the parallel lines shall be ruled or drawn.-

With the above and otherobjects in View my invention consists in, the combination, arrangement and details of construction disclosed in the drawings and specification, and then more particularly pointed out in the appended claims. I

, In the drawings, wherein similar reference characters designate similar parts thruout the respective views Figure 1 is a perspective view of my invention,

Figure 2 is an endelevation of my inventi on, partly in section,

Figure 3 is a top plan view ot my invention, Figure t is a bottom plan view of my invention,

Figures is a diagrammaticview otthe worl: done by my invention,

Figure 6 is a rear end elevation 01" my in vention, I

Figure 7 is a tragmental detail;perspective view otthe blade attachment of my device, and v Figure 8 is a front elevation of my invention. 7 Referring to the drawings, which are merely illustrative of my invention a compass is shown consisting of the handle or shank 10, having the annular flange- 11 formed with a stub 12 provioed with the oppositely and downwardly extending legs 13 and 16 which are formed resilient so as'to be laterally yieldable as well as adjustablef The lower portion ll of the leg 13 terminates in a prong 15, while the leg 16 has a biturcated portion. Both legs 13 and 16 come together in an arch at thc'u per end of the implement.

The bifurcated portion of the leg 16 con sists of the substantially parallel branches or arms 17 and 1S whichare also formed resilient so as to be laterally yieldable and adjustable.

At the lower ends or extremities of the arms 17 and 18 pencil points or pen points 18 and 19 project, and are retained in these arms in to provide a spring mounting for said pencils so that uponsevere pressure the pencil points may yield by moving upwardly in the arms.

As a means of laterally adjusting or separating the l s as between tl'lemselves or the arms as betweenthemselves, screw bolt 24 is arranged to connect with these arms and leg as follows: this boit is screw threadcu 10;

the greater portion-of itsleno-t-h'and one end issecured to the arm 18 or the bifurcated portion oi the compass soas to swivel therein without movement in thc d irecti onof its own axis. I I l This screw bolt 24; also threaded into the arm 17 of the bifurcatedportion 0t 18, and thence it extends: across so as to span leg .13 and arm 17, being threaded thru leg 13 and projecting therebeyond, and at its be rotated.

free end this screw bolt 24 carries a knurled head or flange 27 by means of which it may Aknurledcollar26isalsothreaded upon screw bolt 24; and is stationed between leg 13 and head 27; another similar collar 25 is screw threaded upon bolt 24. so as to bear against arm 17 and be located between arm 17 and leg 13.

It will be readily seen that when the screw bolt 2-1-is rotated both arms and the leg 13 may be caused to separate or to approach; but I prefer that the screw bolt 24: project thru unthreaded openings in the arms and legs oil the compass, so that the collars 25, 26 may be the actuating means for separating the arms orthe legs. Thus by rotating the collar 25 the arms 17, 18 may be brought together; similarly by rotating collar 26 the legs may be brought together.

A most important feature of my invent on relates to means serving as straight edge against which to line a ruler for the purpose of causing lines to be drawn parallel to the ruler. The sheet metal guard or flat blade 21 is provided and disposed in an upright position closely adjacent pencil poL 19, its upper end taking the form of a lug 2O operatively secured to t arm 18. Inscribed 11% upon one side of this blade is a mark 2 -5.

When new it is desired to rule parallel lines the two pencil points 18 and. 19will be drawn toreibly across the sl iect of paper A producing the parallel lines 30 shown in Figure 5; if it is desired to gauge the distance apart between sets of parallel lines 30, all it is necessary to do is to set the leg relatively to the bifurcated leg 16 by operating the threaded collar 26 which screws upon screw bolt 24; thus leg 13 can be flexed inwardly or outwardly; the distance between the prong 15 and pencil point 18 defines the space 32 between. the sets of parallel lines 5; and. of course this space will be uniform, so the sets of parallel lines will be spaced uniform distances apart.

lln order to position a ruler upon the work ing sheet. in a manner to rule parallel. lines properly, I have devised the blade 21 to act, in conjunction with point orspur 15, as a gauge; instead of'employing. a ruler to pro vide the initial line to be paralleled I cinploy the blade 21 in a manner to set the ruler itself in position on the sheet to set apart parallel lines. r

In practice the calibration mark 231 on blade 21 will be brought into registration with mark 23 on the sheet A, it this latter mark is known to be parallel to the edge of the sheet; otherwise the spur 15 of thecompass will be pushed into the edge C of the sheet, while the calibration mark 22 of blade 21 will be caused to register with this same edge C; this having been done, and while the blade is still in the last named position, a ruler D is taken and presented with its straight edge against the blade 21. hold the ruler against movement and draw the device across the sheet and as the two pencil points 18 and 19 will touch the paper the same time the blade 21 does, these points will now trace two lines which will be exactly parallel with the edge C of this sheet. In this manner it is assured that the initial line will be parallel with the edge of the sheet, and therefore every other lines and sets of parallel lines will be parallel.

I do not mean to limit mysell to the exact details oi construction herein disclosed but intend to cover all variations and changes set forth in the appendedclaims.

What I desire to protect and seek by Letters Patent is LA device as described consisting of a shank having two legs, one Of which is forked at its lower entremity to rule parallel lines, and means for adjustably controlling the separation or the legs.

2. A device as described consisting of a Next shank having two legs resiliently mounted of which one leg is forked, a pointed prong torn'ied upon the free end of the other leg, means carrying lead points at the tree ends of the meinhers'ot the torked leg, and means carried by the forked leg and engaging adjustably the other leg for varying'the distance apart between the legs.

3. A device as described consisting 01'' a shank, a pair oft resilient legs yieldably mounted upon said shank, a pointed prong carried by one of said legs, a pair of yield ably separable stems carried by the other leg, pencil points car ied removably by said stems designed to rule parallel lines, means for varying the distance apart of said stems, and means for varying the distance apart-between said set of stems and said pointed pron l. A device as describedconsisting of a compass equipped with a bifurcated. leg,

means for holding pencil points at the lower extremities of? the branches of said bifurcated leg, to r rul in parallel lines, and guide means carried by said lniinrcated leg for abutment against a straight edge whereby said pencil points may be usedgtor scribing parallel lines.

5. A device as described consisting of a compass having a pointed leg and a lead carrying bifurcated leg, means for controlling the separation of said legs, and a flat blade carried by one bifurcation the bifurcated leg and designed for slidably engaginga ruler to prevent rotation of the bifurcated leg during a drawing of parallel lines.

,6. A compass having one leg provided with a pencil point and with a flat blade disposed [laterally of the pencil point, and serving to guide a pencil point as it slides against the straight edge of a ruler. v v

In witness whereof he has hereunto set his hand this tenth day'o'l March, 192?.

HECTOR FALLETTA. 

